GENERAL DESCRIPTION
The IS31LT3170 and IS31LT3171 are adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10mA to 150mA. The devices can operate from an input voltage from 2.8V to 42V with a minimal voltage headroom of 0.264V. Designed with a low dropout voltage; the device can drive LED strings close to the supply voltage without switch capacitors or inductors.

FEATURES
● Low-side current sink
   - Current preset to 10mA
   - Adjustable from 10mA to 150mA with external
      resistor selection
● Wide input voltage range from
   - 2.8V to 42V (IS31LT3171)
   - 5V to 42V (IS31LT3170)
   with a low dropout of 0.5V
● Up to 10kHz PWM input (IS31LT3171 only)
● Protection features:
   - 0.2%/K negative temperature coefficient forthermal protection
   - Open circuit and over voltage protection
● Up to 1W power dissipation in a small SOT23-6
   package
● RoHS compliant (Pb-free) package

APPLICATIONS
● Linear current sink
● Current limiter for power supplies
● LED signage
● Retail lighting in refrigerator, freezer case and
   vending machines
● Instrumentation LED lighting